Skse 16640 Link -

Revisit Step 4 of the installation guide. Ensure the Scripts folder from the SKSE download was correctly placed or activated in your mod manager.

In the extracted SKSE folder, open the folder named , and then open Scripts . Highlight all the .pex files inside.

For game version 1.6.640 , you specifically need SKSE64 version 2.2.3 . Using a newer or older version of SKSE will cause the game to crash on startup. How to Install SKSE 1.6.640 (Step-by-Step) skse 16640 link

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Right-click SkyrimSE.exe , go to Properties -> Details , and check the "Product version". If it is not 1.6.640, you downloaded the wrong SKSE version. If your game has auto-updated to a newer version (like 1.6.1130 or 1.6.1170), you must either upgrade SKSE to match or use the Skyrim Downgrade Patcher to return your game to 1.6.640. The Game Crashes Immediately on Startup (CTD) Revisit Step 4 of the installation guide

Look for the "Current Anniversary Edition build 2.2.3 (game version 1.6.640)" link.

Open Vortex and go to the tab.

Right-click skse64_loader.exe and select for easy access. Double-click your new desktop shortcut to launch the game. Verifying the Version In-Game